.\"	$RuOBSD: sf2r.4,v 1.3 2001/10/26 05:38:44 form Exp $
.\"	$OpenBSD: sf2r.4,v 1.15 2013/07/16 16:05:49 schwarze Exp $
.\"
.\" Copyright (c) 2001 Vladimir Popov
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
.\" ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: July 16 2013 $
.Dt SF2R 4
.Os
.Sh NAME
.Nm sf2r
.Nd SoundForte RadioLink SF16-FMR2 FM radio device
.Sh SYNOPSIS
.Cd "sf2r0   at isa? port 0x384 flags 0x00"
.Cd "radio* at sf2r?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the SF16-FMR2 FM radio tuners.
.Pp
The SF16-FMR2 is a stereo FM tuner that can tune in the range
87.5 \- 108.0 MHz, report signal status on the current frequency, force
audio output to mono, perform hardware signal search, and has an internal
AFC.
.Pp
The card is based on the TEA5757 chip; see
.Xr radio 4
for details.
.Pp
The SF16-FMR2 cards take only one I/O port.
The I/O port is set by the driver to the value specified in the configuration
file and must be 0x384.
.Pp
The flags control the driver behavior.
For example, with flags 0x01 the driver
will assume that there is a TEA5759 chip.
.Pp
MediaForte made two variants of the SF16-FMR2 cards, the first one has
an internal amplifier (PT2254A chip) of the output sound, the second one
does not have such an amplifier.
The current driver supports both variants.
.Sh SEE ALSO
.Xr intro 4 ,
.Xr isa 4 ,
.Xr radio 4 ,
.Xr radio 9
.Sh HISTORY
The
.Nm
device driver appeared in
.Ox 3.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Vladimir Popov Aq Mt jumbo@narod.ru
and
.An Maxim Tsyplakov Aq Mt tm@oganer.net .
The man page was written by
.An Vladimir Popov Aq Mt jumbo@narod.ru .
